How does Excel2013 open an Excel document in read-only mode?

1,MouseDouble-clickComputerClick the Excel worksheet icon on the desktop to open and run the worksheet. In the open Excel2013 worksheet program window, click "open other workbooks" in the left-side pane. As shown in the figure;

2. On the displayed page, choose computer> Browse. As shown in the figure;

3. In the displayed dialog box, find the directory for storing the Excel worksheet and select the Excel worksheet. As shown in the figure;

4. Select an Excel worksheet and click the inverted triangle drop-down button next to the "open" button. As shown in the figure;

5. Click the inverted triangle drop-down button. In the displayed list, select the "Open (R) in read-only mode" option and click it. As shown in the figure;

6. Return to the Excel worksheet editing window. On the title bar, we can see that our current file is opened in "read-only" mode. As shown in the figure;